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| author | Stephen Hemminger <shemminger@osdl.org> | 2006-12-07 15:08:17 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-08 17:19:20 -0800 |
| commit | 3644f0cee77494190452de132e82245107939284 (patch) | |
| tree | 7aeb1dd32c68e372cc2aaa9d26703dd238b48a53 /net/ipv4/ip_output.c | |
| parent | eb991b39385c7b04923d701764a34694ec54b53d (diff) | |
| download | kernel_samsung_smdk4412-3644f0cee77494190452de132e82245107939284.zip kernel_samsung_smdk4412-3644f0cee77494190452de132e82245107939284.tar.gz kernel_samsung_smdk4412-3644f0cee77494190452de132e82245107939284.tar.bz2 | |
[NET]: Convert hh_lock to seqlock.
The hard header cache is in the main output path, so using
seqlock instead of reader/writer lock should reduce overhead.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_output.c')
| -rw-r--r-- | net/ipv4/ip_output.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index a35209d..f071f84 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -164,7 +164,6 @@ EXPORT_SYMBOL_GPL(ip_build_and_send_pkt); static inline int ip_finish_output2(struct sk_buff *skb) { struct dst_entry *dst = skb->dst; - struct hh_cache *hh = dst->hh; struct net_device *dev = dst->dev; int hh_len = LL_RESERVED_SPACE(dev); @@ -183,16 +182,9 @@ static inline int ip_finish_output2(struct sk_buff *skb) skb = skb2; } - if (hh) { - int hh_alen; - - read_lock_bh(&hh->hh_lock); - hh_alen = HH_DATA_ALIGN(hh->hh_len); - memcpy(skb->data - hh_alen, hh->hh_data, hh_alen); - read_unlock_bh(&hh->hh_lock); - skb_push(skb, hh->hh_len); - return hh->hh_output(skb); - } else if (dst->neighbour) + if (dst->hh) + return neigh_hh_output(dst->hh, skb); + else if (dst->neighbour) return dst->neighbour->output(skb); if (net_ratelimit()) |